Giordano, P, Sileri, P, Buntzen, S, Stuto, A, Nunoo-Mensah, J, Lenisa, L, Singh, B, Thorlacius-Ussing, O, Griffiths, B & Ziyaie, D 2015, ' Interim results of a european, multi-centre, prospective, observational study of permacol™ collagen paste injection for the treatment of anal fistulas ', Gut, vol. 64, no. Suppl. 1, OC-094, pp. A47 . https://doi.org/10.1136/gutjnl-2015-309861.94